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Finding the Fourth Proportional to 713, 1,067.42 and 576.31

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Solution

The fourth proportional to 713, 1,067.42 and 576.31 is: 862.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    713 : 1,067.42 = 576.31 : x
  2. Step 2: Convert to fraction form
    713/1,067.42 = 576.31/x
  3. Step 3: Cross multiply
    713x = 1,067.42 × 576.31
  4. Step 4: Simplify right side
    713x = 615,164.82
  5. Step 5: Solve for x
    x = 615,164.82/713
  6. Step 6: Final answer
    x = 862.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.